Frequency interference noise. Frequency interference noise is generated by the electromagnetic field winding and fluid flow sensors, electrodes, electromagnetic coupling loop amplifier input, in addition to the work site electromagnetic flowmeter-frequency common-mode interference, introduced its three-frequency power supply series mode interference and other electromagnetic flow meter, the physical mechanism which produces both electromagnetic induction. First enter the electromagnetic coupling loop is generated electromagnetic field winding and fluid flow sensors, electrodes, amplifiers, frequency interference effects on electromagnetic flowmeters work the most, and shape their performance, different characteristics at different excitation technique, thus taking anti-jamming Nor. Electromagnetic flowmeter inlet section must be straight, straight pipe length must be 10 times the sales of new electromagnetic flowmeter pipe diameter, the outlet must also have five times the diameter of the straight section of pipe. By the time the gravimetric method for calibration. When the exhaust end of the flow tube is relatively stable. Start time, timing 30s. Off valve, said liquid weight. Multiple measurements to calibrate the flow of the liquid level. By adjusting the final after a reverse divider output after amplification magnification circuit. So that the output value is consistent with the measurement data obtained new electromagnetic flowmeter price, the calibration is completed. In this paper, weighing sensor accuracy of 0.05%, to meet the measurement requirements. Due to limitations of the actual conditions, if the measurement time is a bit longer but also can improve the measurement accuracy. Wholesale new electromagnetic flowmeters, force measuring instrument since the new electromagnetic flowmeter, Hebei electromagnetic flowmeter measurements provided by the Shanghai Automation Instrumentation Co., Ltd .. Shanghai Automation Instrumentation Co., force measurement (www.licesh.com) is the Shanghai Zhabei District, flow meters leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Since the force measuring device leadership with the staff warmly welcome all inquiries negotiations to create the force measuring instrument since a better future.